Statistical analysis of the fracture behaviour of porous ceramic Raschig rings

Villora, José M.; Callejas, P.; Barba, M. F.; Baudı́n, Carmen

doi:10.1016/s0955-2219(03)00245-0

Cited by 51 publications

(37 citation statements)

References 14 publications

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“…The details of determining compressive strength and Weibull plot are described elsewhere. 18,19 All the tubes were gastight up to a pressure of 2 bar. Two of four tubes withstand the maximal applied pressure up to 35 bar (Table III).…”

Section: 13mentioning

confidence: 99%

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Manufacturing of Tubular Dead‐End Membranes by Continuous Thermoplastic Extrusion

Salehi

Pfaff

Kaletsch

et al. 2013

Int J Applied Ceramic Tech

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Dense and gastight dead-end tubular Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-d (BSCF) membranes were fabricated by thermoplastic extrusion. Optimal feedstocks for the extrusion of dead-end tubular structures were obtained for a feedstock consisting of 89.83 wt% BSCF powder, 5.63 wt% ethylene vinyl acetate (EVA), 3.56 wt% paraffin wax (PW), and 0.98 wt% stearic acid (SA). Thermogravimetric analysis (TGA) was used to determine the thermal characteristics of the feedstock and to characterize the amount of binder removed during the wicking step. Straight and round dead-end tubular membranes with wall thickness of 0.5 mm could be achieved after sintering. The gastightness test showed that the membranes were leak-tight up to a pressure of 35 bar.

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Section: 13mentioning

confidence: 99%

“…Leather clothes (very thin) were used as pressure pads to decrease frictional stresses and to avoid slippage of the membrane tube and the stainless steel plates during compressive strength testing. For calculation the failure tensile strength the following equation described elsewhere 18 was used…”

mentioning

confidence: 99%

Manufacturing of Tubular Dead‐End Membranes by Continuous Thermoplastic Extrusion

Salehi

Pfaff

Kaletsch

et al. 2013

Int J Applied Ceramic Tech

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“…The manufacturing process consists of the following stages: wet milling followed filter press of the resulting suspension, extrusion, drying and sintering in batch or continuous kilns (Reed, 1995). The low porosity of sintered body largely determines its excellent mechanical properties (Isobe et al, 2007) strength as well as reliability of them when exposed to compressive stress during chemical process (Villora et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…However, the latest trends in ceramic packing design require increasing reliability of body to produce minimum closed porosity and homogenous microstructure in rings (Villora et al, 2004). Targeting such properties involve minimizing porosity and increasing homogeneity of ceramic body.…”

Section: Introductionmentioning

confidence: 99%

Effect of moisture content on extrusion process of kaolinitic–illitic clay in manufacturing of ceramic Raschig ring

Salehi

Salem

2008

Journal of Materials Processing Technology

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“…Existen también procesos en los que se utilizan materiales orgánicos, para producir réplicas de estructuras macroporosas de espumas que contienen poros interconectados (11)(12)(13)(14). También se han utilizado agentes que se descomponen o reaccionan para formar estructuras porosas después de un ciclo de tratamiento térmico.…”

Section: Introductionunclassified

Síntesis y caracterización de adsorbentes cerámicos basados en polititanatos de potasio y vidrio SiO2-B2O3-R2O-Al2O3o

Aguilar-González¹,

Gorokhovsky²,

Aguilar-Elguézabal³

et al. 2008

Bol. Soc. Esp. Ceram. Vidr.

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Se fabricaron materiales cerámicos porosos con una composición de 42,5-48,5% polititanato de potasio (sintetizado en sales fundidas), 1,5-7,5% de vidrio SiO 2 -B 2 O 3 -R 2 O-Al 2 O 3 y 50% de almidón de patata. Las muestras se obtuvieron por extrusión de las pastas, secado y sinterizado a 1100 ºC. La caracterización estructural de los materiales se realizó por microscopía óptica y electrónica, difracción de rayos X, métodos de porosimetría por intrusión de mercurio y de adsorción/desorción de nitrógeno sobre la superficie del sólido (BET). La relación óptima del contenido de polititanato de potasio: vidrio fue de 9:1, en base a los mejores resultados de resistencia mecánica. El vidrio funciona como ligante cerámico y participa en la modificación de la estructura del titanato de potasio fibroso obtenido durante la sinterización; la presencia de vidrio transforma la estructura del tetratitanato de potasio, obtenido sin vidrio, en una estructura similar al hexatitanato de potasio. Se encontró que el material sinterizado presenta una superficie específica considerable (1,24 m 2 /g), poros de transporte con diámetro promedio de 35μm y meso-poros con diámetro promedio de 2,3 nm. Además, el material producido tiene buenas propiedades de adsorción de metales pesados como el Pb y puede recomendarse como un adsorbente comercial. Palabras clave: Material adsorbente, titanato de potasio, sinterización, cerámica porosa Synthesis and characterization of ceramic adsorbents based on potassium polytitanates and SiO 2 -B 2 O 3 -R 2 O-Al 2 O 3 glassPorous ceramic materials based on 42.5-48.5 potassium polytitanate (obtained by molten salt synthesis), 1.5-7.5 SiO 2 -B 2 O 3 -R 2 O-Al 2 O 3 glass and 50 potato starch, were produced by extrusion of the pastes, which were further dried and sintered at 1100 ºC. The structural characterization of the ceramic materials was carried out by optical and electron microscopy, X-ray diffraction and methods of nitrogen adsorption and mercury intrusion porosimetry. The optimal weight ratio of the potassium polytitanate:glass was 9:1, which was selected based on the highest compressive mechanical of the materials produced. During the sintering process, the presence of the glass promotes the binding of fibrous potassium titanate crystals and favors modification of their structure from potassium tetratitanate (obtained without glass admixtures) to a structure similar to potassium hexatitanate. It is shown that the produced ceramic materials have a high internal surface area (1.24 m 2 /g) and, in addition to the transport pores with average diameter of 35μm, have meso-pores with an average diameter of 2.3 nm. The developed material showed high capability of adsorption of heavy metals like Pb and could be recommended as a highly efficient adsorbent. Keywords: Adsorbents, potassium titanate, sintering, porous ceramics INTRODUCCIóNLos materiales cerámicos porosos poseen un gran potencial para muchas aplicaciones químicas, térmicas y mecánicas entre muchas otras; además, poseen características que les d...

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Statistical analysis of the fracture behaviour of porous ceramic Raschig rings

Cited by 51 publications

References 14 publications

Manufacturing of Tubular Dead‐End Membranes by Continuous Thermoplastic Extrusion

Manufacturing of Tubular Dead‐End Membranes by Continuous Thermoplastic Extrusion

Effect of moisture content on extrusion process of kaolinitic–illitic clay in manufacturing of ceramic Raschig ring

Síntesis y caracterización de adsorbentes cerámicos basados en polititanatos de potasio y vidrio SiO<sub>2</sub>-B<sub>2</sub>O<sub>3</sub>-R<sub>2</sub>O-Al<sub>2</sub>O<sub>3</sub>o

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